OCILIB操作数据库

下载地址：http://vrogier.github.io/ocilib/download/

文档目录如下，将include和lib（选择lib32还是lib64看自己需求）分别拷贝到自己项目路径下

然后在配置，如下：

代码写好后，要将lib目录下的dll文件放在执行程序同路径下

下面是api中的例子：

查询数据

#include "ocilib.h"

int main(void)
{
    OCI_Connection *cn;
    OCI_Statement  *st;
    OCI_Resultset  *rs;

    if (!OCI_Initialize(NULL, NULL, OCI_ENV_DEFAULT))
        return EXIT_FAILURE;

    cn  = OCI_ConnectionCreate("db", "usr", "pwd", OCI_SESSION_DEFAULT);
    st  = OCI_StatementCreate(cn);

    OCI_ExecuteStmt(st, "select * from products");

    rs = OCI_GetResultset(st);
   
    while (OCI_FetchNext(rs))
        printf("code: %i, name %s\n", OCI_GetInt(rs, 1)  , OCI_GetString(rs, 2));

    printf("\n%d row(s) fetched\n", OCI_GetRowCount(rs));

    OCI_Cleanup();

    return EXIT_SUCCESS;
}

条件查询：

#include "ocilib.h"
#include 
using namespace std;
int main(int argc, char *argv[])

{

    OCI_Connection* cn;

    OCI_Statement* st;

    OCI_Resultset* rs;

    OCI_Initialize(NULL, NULL, OCI_ENV_DEFAULT);

    string db = "TC8";

    cn = OCI_ConnectionCreate((otext*)db.c_str(), "infodba", "infodba", OCI_SESSION_DEFAULT);
    string id = "ASHOK";
    st = OCI_StatementCreate(cn);
    OCI_Prepare(st,"select * from signoff_info WHERE ITEMID=:ID");
    OCI_BindString(st,":ID",(otext*)id.c_str(),id.size());
    OCI_Execute(st);

    rs = OCI_GetResultset(st);
    while (OCI_FetchNext(rs))
    {
        printf(" %s\n",OCI_GetString(rs,1));

    }
    OCI_Cleanup();
    retrun EXIT_SUCCESS;
}

BLOB/CLOB/NCLOB:

#include "ocilib.h"

#define SIZE_BUF 512

int main(void)
{
    OCI_Connection *cn;
    OCI_Statement *st;
    OCI_Resultset *rs;
    OCI_Lob *lob1, *lob2;

    char temp[SIZE_BUF+1];
    int code, n;

    if (!OCI_Initialize(NULL, NULL, OCI_ENV_DEFAULT))
        return EXIT_FAILURE;

    cn = OCI_ConnectionCreate("db", "usr", "pwd", OCI_SESSION_DEFAULT);
    st = OCI_StatementCreate(cn);
 
    OCI_ExecuteStmt(st, "select code, content from test_lob for update");

    rs = OCI_GetResultset(st);
    
    while (OCI_FetchNext(rs))
    {
        code = OCI_GetInt(rs, 1);
        lob1 = OCI_GetLob(rs, 2);
        lob2 = OCI_LobCreate(cn, OCI_CLOB);

        n = OCI_LobWrite(lob1, "Today, ", 7);
        OCI_LobSeek(lob1, n, OCI_SEEK_SET);
       
        n = OCI_LobWrite(lob2, "I'm going to the cinema !", 25);
       
        OCI_LobAppendLob(lob1, lob2);
        OCI_LobSeek(lob1, 0, OCI_SEEK_SET);
        
        n = OCI_LobRead(lob1, temp, SIZE_BUF);
        temp[n] = 0;

        printf("code: %i, action : %s\n", code, temp);
            
        OCI_LobFree(lob2);
    }

    printf("\n%d row(s) fetched\n", OCI_GetRowCount(rs));

    OCI_Cleanup();

    return EXIT_SUCCESS;
}

BFILE/CFILE:

#include "ocilib.h"

int main(void)
{
    OCI_Connection *cn;
    OCI_Statement *st;
    OCI_Resultset *rs;
    OCI_File *file;
    char buffer[256];
    int n;

    if (!OCI_Initialize(NULL, NULL, OCI_ENV_DEFAULT))
        return EXIT_FAILURE;

    cn = OCI_ConnectionCreate("db", "usr", "pwd", OCI_SESSION_DEFAULT);
    st = OCI_StatementCreate(cn);

    file = OCI_FileCreate(cn, OCI_CFILE);

    OCI_FileSetName(file, "文件路径", "MyfileName");

    /* check if faile exists */

    if (OCI_FileExists(file))
    {
         printf("file size : %d\n", OCI_FileGetSize(file));
         printf("file dir  : %s\n", OCI_FileGetDirectory(file));
         printf("file name : %s\n", OCI_FileGetName(file));
    }

    /* bind for inserting into table */

    OCI_Prepare(st, "insert into my_bfile_table(code, value) values (1, :bfile)");
    OCI_BindFile(st, ":bfile", file);
    OCI_Execute(st);
    OCI_Commit(cn);

    /* free local file object */

    OCI_FileFree(file),

    /* fetch bfile data from table */
 
    OCI_ExecuteStmt(st, "select code, value from my_bfile_table");
 
    rs = OCI_GetResultset(st);

    while (OCI_FetchNext(rs))
    {
        file = OCI_GetFile(rs, 2);

        OCI_FileOpen(file);

        printf("file size  %d\n", OCI_FileGetSize(file));
        printf("file dir   %s\n", OCI_FileGetDirectory(file));
        printf("file name  %s\n", OCI_FileGetName(file));
 
        while (n = OCI_FileRead(file, buffer, sizeof(buffer)-1))
        {
            buffer[n] = 0;
            printf(buffer);
        }

        OCI_FileClose(file);
    }

    OCI_Cleanup();

    return EXIT_SUCCESS;
}

时间：

#include "ocilib.h"

#define SIZE_STR 260

int main(void)
{
    OCI_Date *d1, *d2;

    char str[SIZE_STR+1];
   
    if (!OCI_Initialize(NULL, NULL, OCI_ENV_DEFAULT))
        return EXIT_FAILURE;

    d1 = OCI_DateCreate(NULL);
    d2 = OCI_DateCreate(NULL);

    strcpy(str, "13041978 20:20:12");

    OCI_DateFromText(d1, str, "DDMMYYYY HH24:MI:SS");
    OCI_DateToText(d1, "DD/MM/YYYY HH24:MI:SS", SIZE_STR, str);
    printf("\nDate is %s\n", str);

    OCI_DateSysDate(d1);
    OCI_DateToText(d1, "DD/MM/YYYY HH24:MI:SS", SIZE_STR, str);
    printf("\nSysdate is %s\n", str);

    OCI_DateAddDays(d1, 5);
    OCI_DateAddMonths(d1, 2);
    OCI_DateToText(d1, "DD/MM/YYYY HH24:MI:SS", SIZE_STR, str);
    printf("\nDate + 5 days and 2 months is %s\n", str);

    OCI_DateAssign(d2, d1);
    OCI_DateLastDay(d1);
    OCI_DateToText(d1, "DD/MM/YYYY HH24:MI:SS", SIZE_STR, str);
    printf("\nLast day of the month : %s\n", str);

    printf("\nNumber of days until the end of the months : %i\n",
            OCI_DateDaysBetween(d1, d2));

    OCI_DateFree(d1);
    OCI_DateFree(d2);

    OCI_Cleanup();
 
    return EXIT_SUCCESS;
}